What Is Sizing | Purpose Of Textile Sizing | Properties Of Sized Yarn


Sizing is a protective process. Identically, the process of applying a protective adhesive coating upon the surface of the yarn is called sizing. Sizing is also the heart of weaving. This is the most important operation to attain maximum weaving efficiency, especially for blended and filament yarns.

Sizing is the most important term for weaving technology. After winding and warping, sizing of yarn is done during beam preparation. Furthermore, sizing is done by applying various types of size materials to the yarn. During the application of size materials steam is needed.

Purpose of Sizing:

Sizing is done during beam preparation for getting some advantage of the weaving process. Moreover, sizing has lots of objectives. The following are the purpose of the sizing process. They are-

  • Firstly, sizing improves the weave ability of warp yarn by making it more resistance to action of weaving like absorption, friction, tension etc.
  • Secondly, to maintaining good fabric quality by reducing hairiness, weakness and by increasing smoothness and absorbency of yarn.
  • Thirdly, tensile or breaking strength of cellulosic yarn increase by sizing.
  • After that, elasticity of the yarn also increase.
  • Then, yarn weight increase for adding size materials.
  • Moreover, size material uses to increase the frictional resistance.
  • Projected fibers also remove by this process.
  • Lastly, sizing applies to reduce electrostatic formation.

Properties of Sized Yarn:

Generally, size ingredients use for warp yarn but sometimes it applies to weft yarn. Anyhow, the following properties are obtained by applying size ingredients to the yarn. The following are the properties of sized yarns. They are-

  • Higher elasticity
  • Higher yarn strength
  • Lower flexibility
  • Lower extension or elongation
  • Frictional resistance is low
  • Increased smoothness
  • Less weakness
  • Insensible to over drying
  • Less hairiness

In sum, the sizing process plays an important role in the weaving process because better-sized yarn can give proper weaving efficiency. The production efficiency also depends on the sizing process. As a result, the manufacturer should use accurate size ingredients for getting balance size solutions.

So, size ingredients change the physical properties of cellulosic fibers which are used for making a weaver beam.

30 thoughts on “What Is Sizing | Purpose Of Textile Sizing | Properties Of Sized Yarn”

  1. Congratulations. This article has presented nearly all of the incorrect facts known about sizing and sized warp yarn.
    Jake Lark

  2. Hi I am leading supplier of sizing chemicals to the paper industry in India. I am looking forward to diversify. Can someone please brief me up about the sizing chemicals in Textile Industry?

  3. Hi, our company Laros is leading in italian textile sizing since 1986.
    Actually we are facing new researches related to Pva desizing, in order to safe water and energy, and new recipes pva free.
    We are very interested to stay in contact, exchange ideas and get suggestions to new markets.
    Our main foreign customers are in eastern europe (Rumania and Bulgaria), north Africa (Morocco, Tunisia, Egypt) , middle east (Turkey), India and pakistan.

  4. hi all,

    We are supplier of sizing agent for polyester filament and spun yarn. This is a product developed to meet the requirements from the customers and environment, which proved to be a perfect alternative of the PVA.
    It features of low viscosity, better penetrant property, easy to cook, good compatibility with other sizing, esay to be desizing and easily degradable.
    With the right application method, will reduce the cost for weaving as well as for water treatment, improve the weaving efficiency.

  5. waw;it is so nice but i will ask for all textile researcher to tell me how i reduce the reminant of un sized yarn on warper beam/ means on the creel of sizing machine?

  6. We are leading manufacturers of Textile Sizing and Processing Chemicals

    If you need Sizing Chemicals or recipes to be used , you can contact me

    Sizing Chemicals ::
    We have Acrylic Binders, Polyester Resin , Poly Vinyl Alcohol ,Synthetic Softener, Cationic Softener , Tallow , Thin boiling Starch , Modified Starch , One Shot, Glycerine , wax and film

    Processing Chemicals :: Poly vinyl Acetate , UF Resin , Formalein free Resin , Poly Vinyl Alcohol , Acrylamide , AMH

  7. Zydex industries are a pioneer of polyester sizing products globally. Its polyester resin sizing products form nano-level dispersion that results in outstanding filament-to-filament bonding. Its range of polyester products are designed to easily replace acrylic sizes requiring the same desizing processes that are typically used for acrylics such as caustic soda desizing instead of soda ash desizing recommended for other PET resins.


Leave a Comment